Herbs, perennial, scandent. Root spheroid, enlarged. Stem and branches sulcate and angular, without verrucose glands, sparsely puberulent. Leaf blade ovate-cordate or triangular-cordate, membranous, abaxially hispid on veins, adaxially strigose-punctate, margin entire or 2-or 3-lobed. Male inflorescence racemose, 5-8-flowered, bracteate; calyx segments triangular-ovate, valvate, sparsely pilose; corolla oblong or ovate; stamens 5; anthers curved. Female flowers 1-3, ovoid or cylindric; ovules numerous, horizontal. Fruit subglobose or cylindric. Seeds ovate or ovate-oblong, apex truncate or obtuse, unwinged. 2n = 32.
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